Heat dissipating fin and heat dissipating device

ABSTRACT

A heat dissipating fin including a main body and a through hole is provided. The through hole is formed at the main body. The through hole includes at least two collar portions, and the collar portions are formed on an edge of the through hole. Each of the collar portions includes a first extending portion and a first bridging portion. A first angle is formed between the first extending portion and the first bridging portion. The heat dissipating fin and the heat dissipating device can form a uniform holding force between the heat dissipating fin and the pipe, reduce the damage of the pipe in the assembly, and improve the heat dissipation efficiency.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of TW application serial No. 102146943, filed on Dec. 18, 2013. The entirety of the above-mentioned patent application is hereby incorporated by references herein and made a part of specification.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a heat dissipating fin and, more particularly, to a heat dissipating fin applied to a heat dissipating device.

2. Description of the Related Art

Heat is generated when an electronic device operates. To avoid that too much heat are accumulated at the electronic device and affects the performance of the electronic device, a heat dissipating unit is usually applied to the electronic device.

A conventional heat dissipating device at least includes a base plate contacted to a heat source, multiple fins and a pipe connected to the base plate and passing through the fins, the heat generated from the electronic device is transferred to the pipe via the base plate to dissipate heat.

When the fins of the heat dissipating device and the pipe are assembled, the fins are disposed at intervals, and then the pipe and the heat dissipating fins are pressed to be combined via a stamping die. However, the wear at the connection between the pipe and the fins is not easily avoided via the single-direction stamping, even the micro-structure of the pipe is destroyed, and thus the quality of the heat dissipating device is poor. Additionally, since the wear at the front end (which is stamped first) is more serious, and the holding force between the heat dissipating fin and the worn portion of the pipe is decreased, the holding force between the heat dissipating fin and the pipe is not uniform, and the stability of the whole architecture is affected.

BRIEF SUMMARY OF THE INVENTION

A heat dissipating fin including a main body and a through hole is provided. The through hole is formed at the main body. The through hole includes at least two collar portions, and the collar portions are formed on an edge of the through hole. Each of the collar portions includes a first extending portion and a first bridging portion. A first angle is formed between the first extending portion and the first bridging portion.

A heat dissipating device is also provided. The heat dissipating device includes a base and a heat dissipating fins set positioned on the base. The heat dissipating fins set includes a plurality of heat dissipating fins. Each of the heat dissipating fins includes a main body and a through hole formed on the main body. The through hole includes at least two collar portions, and the collar portions are formed on an edge of the through hole. Each of the collar portions includes a first extending portion and a first bridging portion, and at least a pipe passing through the through holes of the heat dissipating fins. A first angle is formed between the first extending portion and the first bridging portion.

In sum, according to the heat dissipating fin and the heat dissipating device in the embodiments of the disclosure, a uniform holding force is formed between the heat dissipating fin and the pipe, the damage of the pipe in the assembly is reduced, and the heat dissipation efficiency is improved.

These and other features, aspects and advantages of the present disclosure will become better understood with regard to the following description, appended claims, and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram showing a heat dissipating fin in an embodiment of the disclosure;

FIG. 2 is a schematic diagram showing a cross section of the heat dissipating fin in FIG. 1 along the cross line DD;

FIG. 3 is an enlarged view showing a through hole of the heat dissipating fin in FIG. 1;

FIG. 4 is a schematic diagram showing the assembly of a heat dissipating device in a first embodiment;

FIG. 5 is a partial exploded view showing a heat dissipating device in a first embodiment;

FIG. 6A is a schematic diagram showing a side cross section of a heat dissipating device along the cross line AA;

FIG. 6B is an enlarged view showing a part of the selected part C of a heat dissipating device in FIG. 6A; and

FIG. 6C is a schematic diagram showing a side cross section of a heat dissipating device in FIG. 5 along the cross line BB.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A heat dissipating fin and a heat dissipating device will be illustrated with relating drawings, and the same number donates the same component.

FIG. 1 is a schematic diagram showing a heat dissipating fin in an embodiment of the disclosure. FIG. 2 is a schematic diagram showing a cross section of the heat dissipating fin in FIG. 1 along the cross line DD. FIG. 3 is an enlarged view showing a through hole of the heat dissipating fin in FIG. 1.

In an embodiment, a heat dissipating fin 1 includes a main body 10 and at least a through hole 12 formed on the main body 10. In the embodiment, the number of the through hole 12 is four, however, the number of the through hole 12 is not a limitation herein. In an embodiment, the material of the heat dissipating fin 1 is aluminum, copper, aluminum alloy, copper alloy or copper aluminum alloy which is not limited herein.

Each through hole 12 at least includes two collar portions 122, each collar portion 122 forms on the edge of the through hole 12. The collar portions 122 are formed by punching, and thus one end of the collar portion 122 is connected to the through hole 120. In the embodiment, four collar portions 122 are shown, and the collar portions 12 are arranged at intervals to allow an elastic deformation for the collar portions 122, so as to decrease accumulated tolerance when multiple heat dissipating fins are assembled.

Please refer to FIG. 2 and FIG. 2, each collar portion 122 includes a first extending portion 122A and a first bridging portion 122B. A first angle θ1 is formed between the first extending portion 122A and the first bridging portion 122B.

In an embodiment, the first angle θ1 formed between the first extending portion 122A and the first bridging portion 122B is an acute angle. That is, the diameter R1 of the first extending portion 122A is larger than the diameter R2 of the first bridging portion 122B. The diameter R1 is the diameter of the widest part of the first extending portion 122A, and the diameter R2 is the diameter of the narrowest part of the first bridging portion 122B. That is, the first extending portion 122A of the collar portion 122 bends inwardly towards the extending direction of the center axis of the through hole 12, thus the first bridging portion 122B is sleeved into the through hole of another adjacent heat dissipating fin while multiple fins are assembled together.

In an embodiment, the thickness of the heat dissipating fin 1 is about 0.4 mm, the heat dissipating has a punched hole with the diameter of 0.6 mm to form the first bridging portion 122B. Then, a punched hole with the diameter of 0.62 mm is punched to form the first extending portion 122A. In another embodiment, the thickness of the heat dissipating fin 1 is about 0.3 mm, the heat dissipating fin 1 have a punched hole with the diameter of 0.59 mm to form the first bridging portion 122B. Then, a punched hole with the diameter of 0.60 mm is punched to form the first extending portion 122A. It is to be understood that the diameters disclosed above are for examples and can be varied according to different requirements, which is not limited herein.

In the embodiment, the heat dissipating fin 1 at least includes two embedding slots 14, and each embedding slot 14 cooperates with the base. When multiple heat dissipating fins 1 are assembled together to form a heat dissipating fin set, the embedding slot 14 fastens the adjacent heat dissipating fin 1, and embedded to the base. The embedding slot 14 is formed at the main body 10 of the heat dissipating fin 1. In this embodiment, the embedding slot 14 is formed at the edge of the main body 10, and the embedding slot 14 and the collar portions 122 are formed at opposite surfaces.

The embedding slot 14 includes a second extending portion 142A and a second bridging portion 142B. When multiple heat dissipating fins 1 are assembled together to form a heat dissipating fin set, the second bridging portion 142B is sleeved at the embedding slot 14 of the adjacent heat dissipating fin 1. As a result, the heat dissipating fin 1 is fastened to the adjacent heat dissipating fin via the first bridging portion 122B of the collar portions 122 and the second bridging portion 142B of the embedding slot 14.

Similarly, the second angle θ2 formed between the second extending portion 142A and the second bridging portion 142B is an acute angle. That is, the diameter R3 of the second extending portion 142A is larger than the diameter R4 of the second bridging portion 142B. The diameter R3 is the diameter of the widest part of the second extending portion 142A, and the diameter R4 is the diameter of the narrowest part of the second bridging portion 142B. That is, the second extending portion 142A of the embedding slot 14 bends inwardly towards the extending direction of the center axis of the through hole 12, and the second bridging portion 142B is easily sleeved into the embedding slot of the adjacent heat dissipating fin.

In the embodiment, the heat dissipating fin 1 further includes at least two flow deflectors 16, the flow deflectors 16 are disposed at the main body 10, and they are preferably disposed at the edge of the main body 10 and close to the base. When multiple heat dissipating fins 1 are assembled to form the heat dissipating fins set, the flow deflectors 16 on the adjacent heat dissipating fins 1 forms an air guiding channel to improve the heat dissipation efficient of the base and avoid the turbulence.

FIG. 4 is a schematic diagram showing the assembly of a heat dissipating device in a first embodiment. FIG. 5 is a partial exploded view showing a heat dissipating device in a first embodiment.

In the embodiment, the heat dissipating device includes a heat dissipating fins set, at least a pipe 2 and a base 3. The heat dissipating fins set is disposed at the base 3. The heat dissipating fins set includes multiple heat dissipating fins 1, and the pipe 2 passes through the through hole 12 of each heat dissipating fin 1.

Additionally, the heat dissipating device further includes at least a fan 4, as shown in FIG. 4, one fan 4 is disposed on the heat dissipating fins set, which is not limited herein.

The base 3 is made of a heat conduction material such as aluminum or copper, which is not limited herein. In an embodiment, the base 3 contacts a heat source element (not shown) directly such as a display adapter and a chip for a better heat dissipation result. The base 3 further includes multiple ribs 32 for being embedded, fastened, or accommodated to the embedding slot 14.

In Brief, the embedding slot 14 of the heat dissipating fin 1 is attached to the ribs 32 of the base 3 thus to fix the heat dissipating fins set. In addition, the heat dissipation efficient can be improved.

In the embodiment, the pipe 2 is a vacuum chamber, and the inner wall of the vacuum chamber includes a sinter layer, and the sinter layer includes liquid heat transfer medium therein. In an embodiment, multiple pipes 2 are included, and thus the number of the through holes 12 is increased accordingly. In an embodiment, the pipe 2 is U-shaped which has a heated end and a condensing end.

In FIG. 4, the assembly of the heat dissipating device is shown. In an embodiment, the heat dissipating fins set with intervals is assembled, and then fixes on the base, and the pipe is assembled to the heat dissipating fins set. In the embodiment, after the pipe 2 is assembled to the base 3, the through hole 12 of the heat dissipating fin 1 aims at the pipe 2, and the pipe 2 passes through the heat dissipating fin 1. The first bridging portion 122B of the collar portions 122 of the heat dissipating fin 1 passes through the through hole 12 of the adjacent heat dissipating fin to assemble the adjacent heat dissipating fins 1 at interval. Moreover, the rib 32 of the base 3 is embedded to the embedding slot 14 of the heat dissipating fin 1.

There are other configurations of the heat dissipating fin 1 which are similar to above embodiments, and will be omitted herein.

Please refer to FIG. 6A to FIG. 6C, FIG. 6A and FIG. 6C are schematic diagrams showing a side cross section of a heat dissipating device in FIG. 5 along the cross line AA and the cross line BB, respectively. FIG. 6B is an enlarged view showing a part of the selected part C of a heat dissipating device in FIG. 6A.

Please refer to FIG. 6A and FIG. 6B, when the pipe 2 passes through the through hole 12 of each heat dissipating fin 1, the outer wall of the pipe 2 is against the first bridging portion 122B to make the first bridging portion 122B deformed and abut against the pipe 2. Consequently, the stability of the heat dissipating fins 1 assembly is improved, furthermore, the contact area between the heat dissipating fin 1 and the pipe 2 is increased, and the heat dissipation efficient is also improved.

Please refer to FIG. 6C, when the pipe 2 passes through the heat dissipating fin 1 via the through hole 12, the embedding slot 14 of the heat dissipating fin 1 is embedded to the rib 32 of the base 3. Similarly, the rib 32 is against the second bridging portion 142B to make the second bridging portion 142B deformed and embedded to the base 3, so as to fix the heat dissipating fin 1 to the base 3.

The deformation of the first bridging portion 122B and the second bridging portion 142B in FIG. 6C is just an example, the deformation of the second bridging portion 142B is various according to the material of the heat dissipating fin 1, the first angle θ1, the second angle θ2, the diameter and so on.

In sum, at least two collar portions are disposed at the through hole of the heat dissipating fin, each of the collar portions includes a first extending portion and a first bridging portion. When the first bridging portion passes through the through hole of the adjacent heat dissipating fin, the adjacent heat dissipating fins are fastened and assembled to form a heat dissipating fins set, and the stability of the connection between the heat dissipating fins can be improved in this manner. Then, by passing through the heat dissipating fin at the pipe orderly, a stable holding force can be provided when the heat dissipating fin and the pipe are assembled, and then the pipe would not be damaged in the assembly. Additionally, according to the structure of the heat dissipating fin, the pipe would be against the first extending portion in the assembly, and the first extending portion would abut against the pipe, and then the contact area between the heat dissipating fin and the pipe is improved, and the heat dissipation affection is also improved.

Although the present disclosure has been described in considerable detail with reference to certain preferred embodiments thereof, the disclosure is not for limiting the scope. Persons having ordinary skill in the art may make various modifications and changes without departing from the scope. Therefore, the scope of the appended claims should not be limited to the description of the preferred embodiments described above. 

What is claimed is:
 1. A heat dissipating fin, comprising: a main body; and a plurality of through holes formed at the main body, wherein each of the through holes includes at least two collar portions, and the collar portions are formed on an edge of the through hole, and each of the collar portions includes a first extending portion and a first bridging portion, a first angle is formed between the first extending portion and the first bridging portion.
 2. The heat dissipating fin according to claim 1, wherein the first angle is an acute angle.
 3. The heat dissipating fin according to claim 1, wherein the diameter of the first extending portion is larger than the diameter of the first bridging portion.
 4. The heat dissipating fin according to claim 1, wherein the heat dissipating fin further includes at least two embedding slots formed at the main body, the embedding slot includes a second extending portion and a second bridging portion, and a second angle is formed between the second extending portion and the second bridging portion.
 5. The heat dissipating fin according to claim 4, wherein the second angle is an acute angle.
 6. The heat dissipating fin according to claim 4, wherein the diameter of the second extending portion is larger than the diameter of the second bridging portion.
 7. The heat dissipating fin according to claim 1, further comprising at least two flow deflectors disposed at the main body.
 8. A heat dissipating device, comprising: a base, a heat dissipating fins set positioned on the base, wherein the heat dissipating fins set includes a plurality of heat dissipating fins, each of the heat dissipating fins includes: a main body; and a plurality of through hole formed on the main body, each of the through holes includes at least two collar portions, and the collar portions are formed on an edge of the through hole, and each of the collar portions includes: a first extending portion and a first bridging portion, wherein a first angle is formed between the first extending portion and the first bridging portion; and at least a pipe passing through the through holes of the heat dissipating fins.
 9. The heat dissipating device according to claim 8, further comprising a fan disposed at the heat dissipating fins set.
 10. The heat dissipating device according to claim 8, wherein the base further includes a plurality of ribs.
 11. The heat dissipating device according to claim 8, wherein the first angle is an acute angle.
 12. The heat dissipating device according to claim 8, wherein the diameter of the first extending portion is larger than the diameter of the first bridging portion.
 13. The heat dissipating device according to claim 8, wherein the heat dissipating fin further includes at least two embedding slots disposed at the main body, the embedding slot includes a second extending portion and a second bridging portion, and a second angle is formed between the second extending portion and the second bridging portion.
 14. The heat dissipating device according to claim 13, wherein the second angle is an acute angle.
 15. The heat dissipating device according to claim 13, wherein the diameter of the second extending portion is larger than the diameter of the second bridging portion.
 16. The heat dissipating device according to claim 8, further comprising at least two flow deflectors formed at the main body. 